# utility for color output for Mercurial commands

#

# Copyright (C) 2007 Kevin Christen <kevin.christen@gmail.com> and other

#

# This software may be used and distributed according to the terms of the

# GNU General Public License version 2 or any later version.

from __future__ import absolute_import

import re

from .i18n import _

from . import (

    encoding,

    pycompat,

    util

)

try:

    import curses

    # Mapping from effect name to terminfo attribute name (or raw code) or

    # color number.  This will also force-load the curses module.

    _baseterminfoparams = {

        'none': (True, 'sgr0', ''),

        'standout': (True, 'smso', ''),

        'underline': (True, 'smul', ''),

        'reverse': (True, 'rev', ''),

        'inverse': (True, 'rev', ''),

        'blink': (True, 'blink', ''),

        'dim': (True, 'dim', ''),

        'bold': (True, 'bold', ''),

        'invisible': (True, 'invis', ''),

        'italic': (True, 'sitm', ''),

        'black': (False, curses.COLOR_BLACK, ''),

        'red': (False, curses.COLOR_RED, ''),

        'green': (False, curses.COLOR_GREEN, ''),

        'yellow': (False, curses.COLOR_YELLOW, ''),

        'blue': (False, curses.COLOR_BLUE, ''),

        'magenta': (False, curses.COLOR_MAGENTA, ''),

        'cyan': (False, curses.COLOR_CYAN, ''),

        'white': (False, curses.COLOR_WHITE, ''),

    }

except ImportError:

    curses = None

    _baseterminfoparams = {}

# start and stop parameters for effects

_effects = {

    'none': 0,

    'black': 30,

    'red': 31,

    'green': 32,

    'yellow': 33,

    'blue': 34,

    'magenta': 35,

    'cyan': 36,

    'white': 37,

    'bold': 1,

    'italic': 3,

    'underline': 4,

    'inverse': 7,

    'dim': 2,

    'black_background': 40,

    'red_background': 41,

    'green_background': 42,

    'yellow_background': 43,

    'blue_background': 44,

    'purple_background': 45,

    'cyan_background': 46,

    'white_background': 47,

    }

_defaultstyles = {

    'grep.match': 'red bold',

    'grep.linenumber': 'green',

    'grep.rev': 'green',

    'grep.change': 'green',

    'grep.sep': 'cyan',

    'grep.filename': 'magenta',

    'grep.user': 'magenta',

    'grep.date': 'magenta',

    'bookmarks.active': 'green',

    'branches.active': 'none',

    'branches.closed': 'black bold',

    'branches.current': 'green',

    'branches.inactive': 'none',

    'diff.changed': 'white',

    'diff.deleted': 'red',

    'diff.diffline': 'bold',

    'diff.extended': 'cyan bold',

    'diff.file_a': 'red bold',

    'diff.file_b': 'green bold',

    'diff.hunk': 'magenta',

    'diff.inserted': 'green',

    'diff.tab': '',

    'diff.trailingwhitespace': 'bold red_background',

    'diffstat.deleted': 'red',

    'diffstat.inserted': 'green',

    'histedit.remaining': 'red bold',

    'ui.prompt': 'yellow',

    'log.changeset': 'yellow',

    'patchbomb.finalsummary': '',

    'patchbomb.from': 'magenta',

    'patchbomb.to': 'cyan',

    'patchbomb.subject': 'green',

    'patchbomb.diffstats': '',

    'rebase.rebased': 'blue',

    'rebase.remaining': 'red bold',

    'resolve.resolved': 'green bold',

    'resolve.unresolved': 'red bold',

    'shelve.age': 'cyan',

    'shelve.newest': 'green bold',

    'shelve.name': 'blue bold',

    'status.added': 'green bold',

    'status.clean': 'none',

    'status.copied': 'none',

    'status.deleted': 'cyan bold underline',

    'status.ignored': 'black bold',

    'status.modified': 'blue bold',

    'status.removed': 'red bold',

    'status.unknown': 'magenta bold underline',

    'tags.normal': 'green',

    'tags.local': 'black bold',

}

def loadcolortable(ui, extname, colortable):

    _defaultstyles.update(colortable)

def _terminfosetup(ui, mode, formatted):

    '''Initialize terminfo data and the terminal if we're in terminfo mode.'''

    # If we failed to load curses, we go ahead and return.

    if curses is None:

        return

    # Otherwise, see what the config file says.

    if mode not in ('auto', 'terminfo'):

        return

    ui._terminfoparams.update(_baseterminfoparams)

    for key, val in ui.configitems('color'):

        if key.startswith('color.'):

            newval = (False, int(val), '')

            ui._terminfoparams[key[6:]] = newval

        elif key.startswith('terminfo.'):

            newval = (True, '', val.replace('\\E', '\x1b'))

            ui._terminfoparams[key[9:]] = newval

    try:

        curses.setupterm()

    except curses.error as e:

        ui._terminfoparams.clear()

        return

    for key, (b, e, c) in ui._terminfoparams.items():

        if not b:

            continue

        if not c and not curses.tigetstr(e):

            # Most terminals don't support dim, invis, etc, so don't be

            # noisy and use ui.debug().

            ui.debug("no terminfo entry for %s\n" % e)

            del ui._terminfoparams[key]

    if not curses.tigetstr('setaf') or not curses.tigetstr('setab'):

        # Only warn about missing terminfo entries if we explicitly asked for

        # terminfo mode and we're in a formatted terminal.

        if mode == "terminfo" and formatted:

            ui.warn(_("no terminfo entry for setab/setaf: reverting to "

              "ECMA-48 color\n"))

        ui._terminfoparams.clear()

def setup(ui):

    """configure color on a ui

    That function both set the colormode for the ui object and read

    the configuration looking for custom colors and effect definitions."""

    mode = _modesetup(ui)

    ui._colormode = mode

    if mode and mode != 'debug':

        configstyles(ui)

def _modesetup(ui):

    if ui.plain():

        return None

    config = ui.config('ui', 'color')

    if config == 'debug':

        return 'debug'

    auto = (config == 'auto')

    always = False

    if not auto and util.parsebool(config):

        # We want the config to behave like a boolean, "on" is actually auto,

        # but "always" value is treated as a special case to reduce confusion.

        if ui.configsource('ui', 'color') == '--color' or config == 'always':

            always = True

        else:

            auto = True

    if not always and not auto:

        return None

    formatted = (always or (encoding.environ.get('TERM') != 'dumb'

                 and ui.formatted()))

    mode = ui.config('color', 'mode')

    # If pager is active, color.pagermode overrides color.mode.

    if getattr(ui, 'pageractive', False):

        mode = ui.config('color', 'pagermode', mode)

    realmode = mode

    if pycompat.osname == 'nt':

        from . import win32

        term = encoding.environ.get('TERM')

        # TERM won't be defined in a vanilla cmd.exe environment.

        # UNIX-like environments on Windows such as Cygwin and MSYS will

        # set TERM. They appear to make a best effort attempt at setting it

        # to something appropriate. However, not all environments with TERM

        # defined support ANSI.

        ansienviron = term and 'xterm' in term

        if mode == 'auto':

            # Since "ansi" could result in terminal gibberish, we error on the

            # side of selecting "win32". However, if w32effects is not defined,

            # we almost certainly don't support "win32", so don't even try.

            # w32ffects is not populated when stdout is redirected, so checking

            # it first avoids win32 calls in a state known to error out.

            if ansienviron or not w32effects or win32.enablevtmode():

                realmode = 'ansi'

            else:

                realmode = 'win32'

        # An empty w32effects is a clue that stdout is redirected, and thus

        # cannot enable VT mode.

        elif mode == 'ansi' and w32effects and not ansienviron:

            win32.enablevtmode()

    elif mode == 'auto':

        realmode = 'ansi'

    def modewarn():

        # only warn if color.mode was explicitly set and we're in

        # a formatted terminal

        if mode == realmode and formatted:

            ui.warn(_('warning: failed to set color mode to %s\n') % mode)

    if realmode == 'win32':

        ui._terminfoparams.clear()

        if not w32effects:

            modewarn()

            return None

    elif realmode == 'ansi':

        ui._terminfoparams.clear()

    elif realmode == 'terminfo':

        _terminfosetup(ui, mode, formatted)

        if not ui._terminfoparams:

            ## FIXME Shouldn't we return None in this case too?

            modewarn()

            realmode = 'ansi'

    else:

        return None

    if always or (auto and formatted):

        return realmode

    return None

def configstyles(ui):

    ui._styles.update(_defaultstyles)

    for status, cfgeffects in ui.configitems('color'):

        if '.' not in status or status.startswith(('color.', 'terminfo.')):

            continue

        cfgeffects = ui.configlist('color', status)

        if cfgeffects:

            good = []

            for e in cfgeffects:

                if valideffect(ui, e):

                    good.append(e)

                else:

                    ui.warn(_("ignoring unknown color/effect %r "

                              "(configured in color.%s)\n")

                            % (e, status))

            ui._styles[status] = ' '.join(good)

def _activeeffects(ui):

    '''Return the effects map for the color mode set on the ui.'''

    if ui._colormode == 'win32':

        return w32effects

    elif ui._colormode is not None:

        return _effects

    return {}

def valideffect(ui, effect):

    'Determine if the effect is valid or not.'

    return ((not ui._terminfoparams and effect in _activeeffects(ui))

             or (effect in ui._terminfoparams

                 or effect[:-11] in ui._terminfoparams))

def _effect_str(ui, effect):

    '''Helper function for render_effects().'''

    bg = False

    if effect.endswith('_background'):

        bg = True

        effect = effect[:-11]

    try:

        attr, val, termcode = ui._terminfoparams[effect]

    except KeyError:

        return ''

    if attr:

        if termcode:

            return termcode

        else:

            return curses.tigetstr(val)

    elif bg:

        return curses.tparm(curses.tigetstr('setab'), val)

    else:

        return curses.tparm(curses.tigetstr('setaf'), val)

def _mergeeffects(text, start, stop):

    """Insert start sequence at every occurrence of stop sequence

    >>> s = _mergeeffects(b'cyan', b'[C]', b'|')

    >>> s = _mergeeffects(s + b'yellow', b'[Y]', b'|')

    >>> s = _mergeeffects(b'ma' + s + b'genta', b'[M]', b'|')

    >>> s = _mergeeffects(b'red' + s, b'[R]', b'|')

    >>> s

    '[R]red[M]ma[Y][C]cyan|[R][M][Y]yellow|[R][M]genta|'

    """

    parts = []

    for t in text.split(stop):

        if not t:

            continue

        parts.extend([start, t, stop])

    return ''.join(parts)

def _render_effects(ui, text, effects):

    'Wrap text in commands to turn on each effect.'

    if not text:

        return text

    if ui._terminfoparams:

        start = ''.join(_effect_str(ui, effect)

                        for effect in ['none'] + effects.split())

        stop = _effect_str(ui, 'none')

    else:

        activeeffects = _activeeffects(ui)

        start = [pycompat.bytestr(activeeffects[e])

                 for e in ['none'] + effects.split()]

        start = '\033[' + ';'.join(start) + 'm'

        stop = '\033[' + pycompat.bytestr(activeeffects['none']) + 'm'

    return _mergeeffects(text, start, stop)

_ansieffectre = re.compile(br'\x1b\[[0-9;]*m')

def stripeffects(text):

    """Strip ANSI control codes which could be inserted by colorlabel()"""

    return _ansieffectre.sub('', text)

def colorlabel(ui, msg, label):

    """add color control code according to the mode"""

    if ui._colormode == 'debug':

        if label and msg:

            if msg[-1] == '\n':

                msg = "[%s|%s]\n" % (label, msg[:-1])

            else:

                msg = "[%s|%s]" % (label, msg)

    elif ui._colormode is not None:

        effects = []

        for l in label.split():

            s = ui._styles.get(l, '')

            if s:

                effects.append(s)

            elif valideffect(ui, l):

                effects.append(l)

        effects = ' '.join(effects)

        if effects:

            msg = '\n'.join([_render_effects(ui, line, effects)

                             for line in msg.split('\n')])

    return msg